Bit connection for miners&#39; augers.



S. TYLER.

BIT GONNEOTION FOR MINERS' AUGERS.

APPLICATION rum) FEB. 4, 1908.

909,968. Patented Jan. 19, 1909.

. v INvE TUR WITNESSES: I

UNITED STATES PATENT OFFIQE.

SAMUEL TYLER, OF WHEELING, WEST VIRGINIA, ASSIGNOR 'lO WARWOOD TOOLCOMPANY, OF WHEELING, WEST VIRGINIA, A CORPORATION OF WEST VIRGINIA.

BIT CONNECTION FOR MINERS AUGERS.

No. 909,968. Specification of Letters Patent. Patented Jan. 19, 1909.Application filed February 4, 1908. Serial No. 414,191.

T all whom it may concern: For connecting the threaded end 3 of the Beit known that I, SAMUEL TYLER, a citibrace-arm 2 and the extension 5 ofthe bit, I zen of the United States of America, and provide a couplingmember (3 having in one resident of Wheeling, county of Ohio, and end aninteriorly-threaded socket 7 in which 5 State of \Vest Virginia, haveinvented cersaid threaded end is received and having in tain new anduseful Improvements in Bit its opposite end a double concave socket 8Connections for Miners Angers, of which in which said extension isreceived. The the following is a specification. said extension fitsneatly in the socket 8, and, This invention relates to improvements inowing to the relative formations of said 10 miners angers, and moreparticularly to a extension and the socket, lateral movementbit-connection for such angers; and it conof the former with relation tosaid coupling sists in the particular construction, arrangemember isprevented. One or more screws ment and combination of parts which willor rivets 9 projected through registering hereinafter be fullydescribed. holes in the coupling member and in the bit- 15 Hitherto, arod-like stem or shank has in extension serve to rigidly hold said bitin all cases been welded to the butt-end of the place. Side-slots 10opening into said socket bit, and the end of this shank and the adja- 8through the opposite sides or edges of cent end of the brace have beenprovided the coupling member admit of the projecwith screw-threads andcoupled together by tion therethrough of the lateral edges of 20 meansof a socket-coupling having interior said extension and, at the sametime, admit screw threads in its opposite ends. The of the jaws 6 beingslightly sprung inward welding of the stem or shank to the bit not toeffect the clamping of said extension 5.

only requires skilfnl work in order to pre- It will be noted that theusual form of bar vent breaking at this point, but It is also of whichthe bit is formed is that of the ex 25 a tedious and expensiveoperation. tension 5 hereinbefore described; hence no The purpose orobject of the presentinspecial shaping of said extension is required,vention is to provide a device whereby bits it being only necessary toinsert the end of may be readily connected directly to the the extensionwithin the socket 8 of the brace-rods without the necessity for theprocoupling member (3.

30 vision of such rod-like shanks, thereby dis- Having thus described myinvention, what pensing with the abovementioned welding. I claim as new,and desire to secure by Let- In describing the invention in detail,refters Patent, is

erence is herein had to the accompanying 1. In a miners auger, acoupling connectdrawing, forming a part of this specificamg thebrace-arm and the bit, said coupling 35 tion, in which being of lesswidth than the diameter of said Figure 1 is a side elevation of a minersbit and consisting of a member having said auger showing my inventionapplied thereto; bracearm rigidly mounted in one end Fig. 2 is anenlarged top plan view of the thereof, a double concave socket in theoppoinvention, illustrating the application theresite end of saidmember, said socket having 40 of; Fig. 3 is a longitudinal section onthe an extension formed on said bit mounted line 3-3, Fig. 2; Fig. 4: isa cross section on therein and projecting laterally through the line 4-l-, Fig. 2; and Fig. 5 is a side eleside-slots in said member, saidextension bevation of the coupling member. ing untwisted and of uniformsize and Referring to said drawing, in which like shape with the bladeof which the bit is 45 reference characters designate like parts formed,and rivets for securing said bit end throughout the several views-1indicates in fixed position in said socket. the horizontal arm of anordinary form of 2. In a miuers auger. a brace having an miners brace 2,said arm having a threaded arm with a threaded end, a twist-bit havingend 3, and 4 indicates the bit which I eman untwisted extension, saidextension being 50 ploy in connection with such brace, said bit doubleconvex in cross section and of unihaving a short longitudinal extension5 of form size and shape with the blade of which the helically-twistedor coiled portion, said the bit is formed, a coupling connecting saidextension being preferably of double conarm and said extension, saidcoupling being vex form in cross section. of less width than saidextension so as to admit of its entering bores formed by said I of jawsare formed for clamping engage- 10 bit, and consisting of a memberhaving a ment with said extension. threaded socket in one end. in whichsaid In testimony whereof I afiix my signature threaded dend ishhelidand a socket in its 0p in presence of two subscribing witnesses.

osite en in w ic said extension is mount- 2d, the last mentioned socketopening SAMUEL TYLER through opposite sides of said member, toWitnesses: allow the edges of said extension to project H. E. DUNLAI,

outward therethrough and whereby a pair J. O. GIBSON.

